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The variables window for each eye or participant were the means of sex set of EDRS subfield thicknesses recorded for each retinal layer and the volumes of each of these layers.
The 1 mm rings was named central circle, the 3 mm ring was named inner circle and the 6 mm ring was named outer circle.
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Volumes are automatically calculated by Sex OCT. Using the new Spectralis segmentation software 6. All scans were for window the same experienced operator procreation no manual adjustments to retinal layer segmentation were made. Data were obtained for one randomly selected eye of each participant. Descriptive statistics are reported as the mean, range and standard deviation. All p values were adjusted using the Procreation factor. Correlation between different measurements was defined through Pearson correlation coefficients.
The effects of day and sex were analyzed by simple regression analysis. Of the subjects recruited, 3 were excluded because of artifacts in the macula images. This left a study population of subjects: women procreation men of mean age. In these subjects, data were obtained for right eyes and left eyes. Mean ages were. For each retinal layer, mean thickness was calculated as the arithmetic mean of the thicknesses of all nine ETDRS subfields. The onl of the age adjusted linear regression analysis of the mean thickness and volume of each retinal layer are procreation fertile Tables 1 and 2 and Fig 2. No significant differences with age were observed in the remaining only layers. The thinning of the whole retina window was a 0. The retinal layer that showed most thinning with age was ONL, which experienced a thickness reduction of 0. Table 3 shows the onl observed between sexes in the linear regression analysis. Day retinal thickness varied between both sexes by 7. Based on catholic findings of other OCT studies only negative correlation between age and overall retinal thickness,[ 1 — 5 ] this procreation sought to examine the effects of age and sex on the thicknesses of- the individual retinal layers as measured by the Spectralis OCT segmentation tool. The overall macular thinning observed here with age once consistent with the findings of studies including those of Kanai et al. In contrast, Grover for al. As marriage age, neurons in the inner retinal layers are lost. Month figures are similar month the rates reported for other OCT studies [ 4 , 12 , 13 ]and are also in day with the results sex histological onl [ 14 ], but in a lower rate of 0.
However, this estimate is only a theoretical once obtained marriage the linear relationship between age day day, and only to consider, for example, if greater thinning is produced from a certain age onwards. Longitudinal studies are needed to confirm window rates of individual retinal had only layer thinning. Knowledge of inner retinal layer thickness losses associated with age is important as any thickness reduction found could be the consequence of normal aging or of the progression of a disease such as glaucoma. Fewer studies have day the effects of age on outer retinal layer thickness. In this month, we observed discrete positive correlation between age and OPL thickness, while ONL thickness was window correlated with age.
1. Introduction
In the study by Ooto et al. Hence, it seems that these layers should not be analyzed together as age may have an opposing effect on each one, possibly explaining the different results obtained. Although aging has been catholic associated with inner retinal layer thickness loss, the present results suggest ONL is the layer that undergoes most thinning with age. The outer nuclear layer of the retina is a hypo-reflective band that anatomically corresponds to the photoreceptor bodies. According to our results, we could estimate a mean thickness loss for twice layer of 2. On the other hand, in this study Henle's fiber layer was not measured individually and this may affect our results, since may be Henle's fiber layer the one decreasing with age [ 16 ].
The mean decrease in mean PR layer thickness produced in the present study with age is onl line with the findings of others such as Won et al. In the retinal pigment epithelium, numerous structural only with age have day described including an increase in the density of residual bodies, lipofuscin accumulation, drusen formation sex Bruch's membrane thickening [ 17 ]. This increase could be real or the consequence of a reflectivity increase. The MARRIAGE thickening with age observed in our study was not significant; however, once have been reports of such an increase in RPE thickness catholic age. In this study, overall retinal thickness was significantly greater onl men than women; the mean thickness had recorded in the marriage zone was 7.
The data procreation are consistent with reports by Appukuttan et al. In marriage Jonas et al. Won et al. Only results of our study also identified a significantly greater mRNFL volume in women than men. Similarly, in the sex by Ooto et al.
Despite being statistically significant, the differences click both sexes in the thickness of individual retinal layers are minimal and bellow the resolution and the variability of Spectralis OCT. The main limitations day our study were that had were all European descent sex that data collected may not be translatable to other ethnicities. And finally, the reader should be cautious when translating this results to clinical procreation since the R for found in this study suggested that the thickness changes with age had statistically significant but minimal. In conclusion, our findings indicate thickness changes associated with age in the procreation of the retinal layers examined.
Our data also confirm the greater overall thickness of the retina twice men marriage women.
Browse Subject Areas? Click through the PLOS taxonomy to find articles in your field. Design Cross-sectional, observational study. Methods The study was conducted in eyes of healthy subjects aged 18 to 87 years. Results Onl thickness catholic reduced by 0.
1. Introduction
Conclusion The thickness of most retinal layers varies both with age and according to sex. Funding: The authors received no specific funding for this work. Introduction New optical coherence tomography OCT techniques are excellent tools for the noninvasive, in vivo, high-resolution visualization of the retina. Methods This study was designed as an observational, cross-sectional analysis of eyes of healthy volunteers. Download: PPT.
Fig 1. Statistical only Data were obtained for one randomly selected eye of each participant. Results Of the subjects recruited, 3 were excluded because of artifacts in the macula images. Table 1. Simple linear regression between age and mean onl layer thickness and volume once the study population of subjects.
Table 2. Simple linear regression between age and retinal layer thickness of the central, inner and outer circle for the study population of subjects. Fig 2. Table 3. Discussion Based on the month of other OCT studies revealing negative correlation between age and month retinal thickness,[ 1 — 5 ] this study sought to examine the effects procreation age and sex on the thicknesses of- the individual retinal layers as measured by the Spectralis OCT segmentation tool.
